How to create a Blender camera to follow real camera in video?
Yes, what you want to do is called camera tracking, or matchmoving.  Read the related post that Scott Milner included in his comment, and I also recommend this video from BlenderGuru to help you get started: https://www.youtube.com/watch?v=CVPcT0dJmoY
If you don't get your Blender camera to move exactly the same as your real camera, your Blender objects will never &quot;sit&quot; properly in your video.
EDIT: I replaced the video link; apparently the old link didn't work anymore - not surprising since I posted this 3 years ago!